I think saws are just so efficient for numerous tasks. If it wasnt winter in a very cold place, I prefer pairing a small saw with a fixed blade knife more than I would with an axe. Dont get me wrong, an axe and bucksaw combo are a powerful pair, but when balancing weight for performance, saws provide a lot of efficiency. I even like the smaller folding saws as they are extremely adept and efficient at constructing shelters, furniture, tools, collecting bows, etc. My favorite compact is the small Silky 130; compact but a very powerful little saw and quite robust. Even the smaller folding ones are very efficient to clean up a camp area, prep my hammock site, make some clean, efficient cuts that would risk my knife chipping especially when close to the ground. The value of even a small folding saw is only limited to one's imagination. I think another nice aspect is that you can get some really clean, technical cuts for traps, fire stands and shelters much faster than with an plain-edged tool.
The Bahco is such a great staple, no bushcrafter is complete without one!
I have a couple of Gerbers and a Fiskars collapsible saws. The lightest Gerber is really pretty sweet and one I often take backpacking. It does have a thin blade and you cant torque it hard, but it is more than capable of feeding a decent sized warming fire.
The surprise of the bunch is an inexpensive Corona 14, fixed-blade that Ive taken out quite often on shorter backpacking trips where we planned to do a lot of open-fire cooking. Its really a great saw and not too heavy.
Im really disappointed Sawvivor went boots-ups (last I heard). I have the 15 model and it is really one of the best, packable buck saws. I actually prefer it over a Sven saw I had many moons ago. The biggest bonus is that it houses two blades, so I always have a backup. Its also pretty light and just plain simple.
I have an older buck saw, the Trailblazer, and it's a tube-constructed one. The 24 blade is nice, but it requires special plastic caps so cheap hardware-store blades wont work off the shelf. Its your standard bucksaw construction when put together, but its heavy and kind of a PITA to set up. On the flip side, my new Dustrude Quick Bucksaw is probably the best packable, large bucksaw on the market. Perfectly simple and fast to put into operation and collapse. The 24 blades are standard (you just have to swap the hardware) and it folds up tight and svelte. Its also one of the lighter saws and just a little bit of sawing Ive done, it works like a charm.
Weights for reference:
Tube-designed bucksaw (Trailblazer): 23oz
Dustrudes Quick Bucksaw: 15.8oz
Sawvivor, 15 (two blades): 10.1oz
Corona 14 fixed-blade saw: 13.5oz (thats with the sheath)
Silky 170: 7.6oz
Bahco: 6.4oz
Silky 130: 6.0oz
Larger Gerber: 4.8oz
Fiskars: 4.0oz
Lightweight Gerber: 3.4oz
Opinal: 4.2oz
Cheers! ROCK6